<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>伪元素</title>
    <style>
        p::first-letter{
            font-size: 40px;
        }
        p::first-line{
            color: red;
        }
        li::before{
            content: "Hello";
            color: blue;
        }
        li;::after{
            content: url（./imges/tubiao.png）;
        }
    </style>
</head>
<body>
    <p>Good morning Hello Lorem ipsum dolor sit amet consecteur adipisicing elit.Minus,soluts saepe dolor delectus even:</p>
    <ul type = "none">
        <li>老大</li>
        <li>老二</li>
        <li>老三</li>
    </ul>
</body>
</html>